Re: Worth leaving shower/bath water to cool down?

Kerosene is going for $1.65/gal in my area. The better benefit of keeping the water is the added humidity.

A more energy efficient thing to do would be to get a tankless hot

> water heater.  Most of your energy loss isn't from the water that you
> use but is from the water that if being held at temp waiting to be
> used.  I'd get one but then I'd never get the kids out of the shower

Allegedly, my father-in-law used to shut off the hot water if he thought one of his five sons was taking too long.

Cindy Hamilton

If you want to get that anal about extracting 8 cents of heat from

> shower waste water, they do have heat recovery devices you could
> install in the drain line.   It's basicly a heat exchanger that runs
> the exiting waste water past the incoming cold water that is going to
> your water heater.   I doubt it's practical, worth the cost/trouble,
> etc but at least you don't have to stand in 4 inchs of water taking a > shower.

The drain line heat recovery device is what you need, like what's described here:

Ken